A curve C is defined implicitly by the following equation:

A curve C is defined implicitly by the following equation:e 202 -4y)+5x = 15e 1. 2. Find all points on C with a vertical tangent line. Give your answers as coordinates. Justify your answer algebraically. Write NONE if no such points exist. A point (k.0) is on the curve C. Solve for k, and the formula of the tangent line at point (k, 0).